[gnome-boxes] machine: Remove a redundant call

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit e9a51e0266475cb20c39f4c5491a58a20c611224
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Thu Aug 29 23:17:36 2013 +0300

    machine: Remove a redundant call
    
    This call should have been deleted as part of commit
    33883def2a47fb477d2f0fb4928c8777466f643b (Fix positioning of thumbnail
    in properties view).
    
    https://bugzilla.gnome.org/show_bug.cgi?id=706414

 src/machine.vala |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/src/machine.vala b/src/machine.vala
index 530e441..2d1aa1b 100644
--- a/src/machine.vala
+++ b/src/machine.vala
@@ -717,7 +717,6 @@ private class Boxes.MachineActor: Boxes.UI {
                 Gtk.Allocation alloc;
 
                 App.app.properties.screenshot_placeholder.get_allocation (out alloc);
-                App.app.topbar.actor.show ();
 
                 // We disable implicit animations while setting the
                 // properties because we don't want to animate these individually